AutoCodes - Toyota - B1242 TOYOTA

B1242 TOYOTA Code - Wireless Door Lock Tuner Circuit Malfunction

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3
Table of contents

|B1242 TOYOTA code possible causes

  • Faulty Door Control Receiver
  • Door Control Receiver harness is open or shorted
  • Door Control Receiver circuit poor electrical connection
  • Faulty Multiplex Network Body ECU

|How do I fix the B1242 TOYOTA code?

Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

|Cost of diagnosing the B1242 TOYOTA code

Labor: 1.0

The cost of diagnosing the B1242 TOYOTA code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

|What are B1242 TOYOTA code possible symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

|B1242 TOYOTA code description

The door control receiver is used to receive electrical waves relating to the entry functions of the smart access system with push-button start (for Entry Function). The certification ECU (smart key ECU assembly) decodes the requested smart access system with push-button start (for Entry Function) operation by identifying a key code based on the electric waves received via the door control receiver. The door control receiver receives a signal from the door control transmitter and sends signals to the main body ECU (cowl side junction block LH) through the certification ECU (smart key ECU assembly). The certification ECU (smart key ECU assembly) then sends a command, according to the requested operation, to each ECU (ex. if door lock operation is requested, the certification ECU (smart key ECU assembly) sends a door lock command to the main body ECU).
OBDII Code B1242 Toyota - Wireless Door Lock Tuner Circuit Malfunction - AutoCodes.com

|Need more information with the B1242 TOYOTA code?

Need more information on how to fix the B1242 TOYOTA code? Get Access to Factory Service Manuals

|Need help with a B1242 TOYOTA code?

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|B1242 TOYOTA code comments

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